Hello,
You may refer to P2000 G3 events description reference to troubleshoot such issues:
Page 26 covers event id 168.
This refers to a faulty PSU or blower. If a reseat does not clear the error, try another replacement.
If issue persists, I'd recommend to collect a set of store logs using the process given below:
Refer the SMU reference guide page 85 to generate and save logs:
Best Regards,
Raj